Using MATLAB programming, dynamic optimization processes were done to evaluate the option values of investments and the timing switching technologies.
High confidence replication timing switching domains were selected with a q-value cutoff of 0.01, corresponding to an overall FDR of 1%.
The downregulation of this transcription may trigger EtoL replication timing switches and cause the heterochromatinization of the corresponding domains, thus contributing to loss of pluripotency.
The fraction of chromosome domains that displayed EtoL switching in response to BAF250a loss (commonly misregulated in BAF250a-deficient ESCs and OSKM cells), showed a very similar tendency of replication timing switching in Brg1 but not BAF53a mutant ESCs.
Indeed, we identified a set of chromosomal domains that undergo replication timing switching in BAF250a-deficient OSKM cells and found that significant fraction of these switching domains overlap with those identified in BAF250a-deficient ESCs.
To examine alignment of timing switching domains to developmental domains, replication timing data from 9 cell types (ESC/iPSC, EBM3/EPL, EBM6/EpiSC, NPC, Mesoderm, Endoderm, partial iPSC, MEF, and Myoblast) were assembled from the ReplicationDomain.org database [ 44] and plotted together with the data from BAF250a mock and OHT.
In order to determine the significant replication timing switching domains that are independent of changes between replicates, we determined Euclidian distance at 10,974 200-Kb segments between groups (that is, mock versus OHT) and within groups (that is, mock replicate-1 versus mock replicate-2), wasch was used to calculate P values at each 200-Kb genomic segment.
The large EtoL replication-timing switches of these domains are strongly associated with loss of pluripotency [ 45, 51].
Then, the number of divisions will not only depend on the number of stem cells, but also on the timing to switch between proliferation and differentiation (Fig. 2).
Prospective multicentric translational studies embedding these newer modalities are needed to confirm the ability of these techniques to do better than bone scintigraphy and CT in terms of disease detection, demonstration of recurrence and to provide an earlier, more refined approach of response evaluation and defining the optimal timing to switch treatment or type of treatment.
